# 商场促销, 满100 减 20, 写一个程序，输
# 入商品的价格，打印出实际支付金额

price = float(input('请输入价格: '))

pay = price - 20 if price >= 100 else price
# if price >= 100:
#     pay = price - 20
# else:
#     pay = price

print('您需要支付：', pay, '元')